Tenosynovitis

A tendon sheath is a double-layered sleeve-like closed synovial tube that surrounds the tendon. It is a synovial sheath that protects the tendon. It surrounds the tendon in two layers, and a cavity between the two layers, the synovial cavity, contains synovial fluid in the tendon sheath. The inner layer is closely attached to the tendon, and the outer layer is lined inside the tendon fiber sheath, which is combined with the bone surface to fix, protect and lubricate the tendon from friction or compression. Tendons are rubbed excessively here for a long time, and injury and inflammation of tendons and tendon sheaths can occur, which causes swelling. This condition is called tenosynovitis. Without treatment, it may develop into permanent inconvenience.